Air filtering and shield attachment



y 1941- H. A. BEDOL 2,249,308

AIR FILTERING AND SHIELD ATTACHMENT I Filed Feb. 24, 1940 Patented July15, 1941 UNITED STATES PATENT oF FIcE i Q I "2,249,3os I AIRFILTERINGAND SHIELD ATTACHMENT?" Harry A. Bedol, CIevelandQOhi h 1Application February 24, 1940, Serial No. 320,657. I

1Claiin. gems-s) This invention relates to combined hood or shield andair filtering attachments for hot air furnaces.

The general object of the invention is to provide a simply constructedand eificient device which can be easily and quickly attached to thefloor or wall register of a room for deflecting air away from adjacentwalls and for excluding dust and other impurities from entering theroom.

Other objects and advantages of the invention will be apparent as thespecification is considered in connection with the accompanying drawing,

in which Figure 1 is a perspective view of my improved attachmentadapted for use with a wall register, part of the grill being brokenaway;

Figure 2 is a perspective view of a slightly dife ferent design ofattachment adapted for use with a floor register;

Figure 3 is a section on the line 3-3 of Figure 1;

Figure 4 is a fragmentary detail showing the inturned flange andfastening clip on the sid walls of the shield member; and

Figure 5 is a section taken on the line 55 of Figure 1. v V

Referring more particularly to the embodiment illustrated in Figure 1 ofthe drawing, l denotes the attachment as a whole shown installed on thegrill 2 of a hot air wall register of conventional form. The grill 2which is positioned over the flue opening in the wall of the room, notshown, is recessed in a register frame, also not shown.

The attachment l comprises a body portion or shield 3, preferably ofsheet metal, and a screen or filter portion 4, so constructed andassembled that simultaneous longitudinal adjustment can be convenientlyeifected to accommodate for registers of different width. Thus theshield or body portion consists of two sheet metal telescoping sections5 and 6 having side walls I and 8, and top or end walls 9 and I0,respectively. The interfitting top or end telescoping walls 9 and ID areprovided with similar flanges l3 and [4, formed on their front and rearedges respectively, the edges of the flanges of the outer or left handsection 6 being rolled or bent upon themselves for receiving and guidingthe flanges l3 and M of section 6. It will be seen that the respectivewalls of the sections 5 and 6 together with the flanges l3 and I4 tendto guide and deflect the hot air emerging from the flue opening awayfrom the adjacent walls of the room.

The screen 4 comprises inner and outer superposed rectangular sections15 and l6 of foraminous material such as wire mesh or'equivalentmaterial, and where wire mesh is employed the edges of the respectivewire panels or sections are protected and reinforced by metal borders l1and l8. .Secured to the inner faces of the side walls I and 8 of theshield sections 5 and 6, as by welding, are a pair of angle brackets 22which provide ledges H and 12, upon :which the screen sections rest;Any.- suitable fastening means such as sheet metal screws l9 and 2 0secure the side edges of the respective panels to the top faces of theseledges, and as the screws make their own threads in the flanges,assembly operations are greatly simplified. The angle brackets 22 forman extension of the side walls. I and 8 of the shield sections andprevent the escape of dust from beneath the outer side edges of thescreen sections. Being coextensive inv length with the depth ofr thescreen sections, the ledges H and- I2 of the bracket members also serveto support the screen sections throughout their entire depth.

The" ledges and I2 lie above and parallel with flanges 2| formed on andextending inwardly from the inner edge of the side walls 1 and 8, thusleaving ample'space for the manipulation of a pair of inwardlyandoppositely extending sheet metal flexible fastening clips or fingers31. These clips, which are suitably attached to the ends or frontextremities of the inner or bottom flanges 2|, as by riveting or thelike, serve to snugly secure the combined shield and screen to theregister 2, when the clips are inserted in appropriate grill openingsand then bent or hooked around the grill in an obvious manner.

,Due to the fact that the fingers 31 can be bent in substantially anydirection, assembly can be conveniently made on round or variouslyshaped registers. I

The inner top wall 19 and its flanges H! are snugly but slidablyreceived within the confines of the top wall 9 and its flanges I3 foradjustment as to length in order to permit one size of shield to fltdifiercnt sizes of registers. During this telescopic movement of theshield sectionsthe screen sections 5 and 6 will be correspondinglyadjusted, the latter sections being maintained in close sliding contactwith each other by means of guide lugs 23 and 24. Thus the lugs 23formed on the inner'ends of the side margins of the outer screen section5 are bent rearwardly and inwardly to tightly but slidably embrace theside margins of the inner screen section 6, while the lugs 24 on theinner screen section 6 are bent outwardly around the side margins of theouter section 5, in tight sliding engagement therewith.

M'ost registers are provided with dampers 3| for regulating the flow ofhot air therethrough. Heretofore considerable difliculty has beenencountered by users of register shields and/or screens because of theinaccessibility of the damper operating lever or button 26 after theshield and/or screens have been secured in place. The space 25 betweenthe top of the grill 2 and the bottom of the screen sections l5 and I6is not suflicient for convenient insertion of the hand even though thedanger of burning the hand on the hot grill did not exist. To overcomethis objection the damper lever 26, located according to common practiceat the side or adjacent'one end of the grill, is provided with .anauxiliary removable elongated operating stem 21, of such length that itshandle portion 28 lies adjacent the open end of the shield and screenwhere it can be conveniently grasped without danger of burning the hand.Movement of the operating stem and handle inwardly .or outwardly in theopening 25, imparts corresponding movement to the damper lever or button26 and causes the damper to rock on its pivot to either open or closedposition according to the direction in which the stem is moved.

The mounting of the screen sections on the ledges H and I2 close to thebottom edges of the side walls of the shield and in veryclose proximityto the grill 2, insures againstthe escape of dust at the sides of thescreen sections and at thesame time provides a very shallow space forthe reception of damper lever. The bracket members on which the ledges'H and i2 are formed, in addition to constituting, in eifect, extensionof the side walls 1 and B,tend to strengthen and brace these side wallsof the shield sections thus permitting the use of relatively light sheetmetal stock. By virtue of this construction and mounting practically nodust can escape between or around the screen sections.

In Figure 2 an embodiment of my invention is shown as applied to ashield or hood for 'a floor register. As this embodiment diiTe'rs onlyslightly from the Figure 1 embodiment "a very-brief-description shouldsufiice. The grill29 inthe regis ter is shown in the horizontal positionassumed when installed on a floor grill. The shield or hood comprisestwo telescoping parts 30 and 3| and each part includes a fiat side wall32, substantially curved top wall 33 as distinguished from the flat sideand flat top walls of the Figure 1 embodiment of my invention. Anglebrackets 34, for supporting the screen sections, are spaced above theflanges 35 extending inwardly from the lower or inner edges ofthesidewalls 32, but because of the relatively greater depth of the sidewalls 32,

' and the fact that the attachment is mounted in a vertical, asdistinguished from the horizontal position of the Figure 1 embodiment,it is not necessary to extend the brackets 34 beyond the ends of theside walls. Instead of employing the flexible fastening clips or fingers31 previously described, the modified form of attachment is assembled bylifting the grill slightly from its casing so that the flanges 35 can beinserted beneath the side edges of the latter. This method of attachmentwould not be possible with conventional curved or bulging wall grills.

Having thus described my invention, what I claim is:

In an attachment for a hot air register, a shield comprising a pair oftelescopically arranged members adaptedto deflect warm air rising from aregister, said members having side walls, a pair of angle bracketsattached'to and bracing said side walls, said angle brackets havingledges thereon, said angle brackets projecting'beyond and constitutingextensions of said side walls, a pair of air filtering members fixed attheir'outer ends to the ledges of said angle brackets, the inner ends ofsaid filtering members arranged in sliding superimposedrelationship toeach other for simultaneous movement with said'first named membersinwardly extending flanges on the inner ends of said side walls forengagement with said register and said angle brackets serving to spacethe air filtering members from said flanges to provide a pocket betweenthe top face of the gegister and the bottom face of the screen mem-HARRY A. BEDOL.

